stdin.c

   1 #include "para.h"
   2 #include "string.h"
   3 #include "list.h"
   4 #include "sched.h"
   5 #include "fd.h"
   6 #include "error.h"
   7 #include "stdin.h"
   8
   9 void stdin_pre_select(struct sched *s, struct task *t)
  10 {
  11         struct stdin_task *sit = t->private_data;
  12         if (sit->loaded < sit->bufsize)
  13                 para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
  14         t->ret = 1; /* success */
  15 }
  16
  17 void stdin_post_select(struct sched *s, struct task *t)
  18 {
  19         struct stdin_task *sit = t->private_data;
  20         ssize_t ret;
  21
  22         t->ret = 1;
  23         if (sit->loaded >= sit->bufsize)
  24                 return;
  25         if (!FD_ISSET(STDIN_FILENO, &s->rfds))
  26                 return;
  27         ret = read(STDIN_FILENO, sit->buf + sit->loaded, sit->bufsize - sit->loaded);
  28         if (ret < 0)
  29                 t->ret = -E_STDIN_READ;
  30         else if (ret > 0) {
  31                 sit->loaded += ret;
  32                 t->ret = ret;
  33         } else
  34                 t->ret = -E_STDIN_EOF;
  35         if (t->ret < 0)
  36                 sit->eof = 1;
  37 }